
47
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37272M6/M8–XXXSP/FP, M37272MA–XXXSP
M37272E8SP/FP, M37272EFSP
MITSUBISHI MICROCOMPUTERS
Rev. 1.3
Fig. 8.8.2 A-D Control Register 1
b
7b
6b
5b
4b
3b
2b
1b
0
A
-
D
c
o
n
t
r
o
l
r
e
g
i
s
t
e
r
1
(
A
D
1
)
[
A
d
d
r
e
s
s
0
0
E
C
1
6
]
A
f
t
e
r
r
e
s
e
t
RW
A
-
D
o
n
t
r
o
l
R
e
g
i
s
t
e
r
1
0
t
o
2
A
n
a
l
o
g
i
n
p
u
t
p
i
n
s
e
l
e
c
t
i
o
n
b
i
t
s
(
A
D
C
1
0
t
o
A
D
C
1
2
)
N
a
m
eF
u
n
c
t
i
o
n
s
b
2
b
1
b
0
0
0
0
:
A
D
1
0
0
1
:
A
D
2
0
1
0
:
A
D
3
0
1
1
:
A
D
4
1
0
0
:
A
D
5
1
0
1
:
A
D
6
1
1
0
:
1
1
1
:
4
t
o
r
a
g
e
b
i
t
o
c
o
m
p
a
r
i
s
o
n
r
e
s
u
l
t
(
A
D
C
1
4
)
0
:
I
n
p
u
t
v
o
l
t
a
g
e
<
r
e
e
r
e
n
c
e
v
o
l
t
a
g
e
1
:
I
n
p
u
t
v
o
l
t
a
g
e
>
r
e
f
e
r
e
n
c
e
v
o
l
t
a
g
e
0
I
n
d
e
t
e
r
m
i
n
a
t
e
0
D
o
n
o
t
s
e
t
.
3T
h
i
s
b
i
t
i
s
a
w
r
i
t
e
d
i
s
a
b
l
e
b
i
t
.
W
h
e
n
t
h
i
s
b
i
t
i
s
r
e
a
d
o
u
t
,
t
h
e
v
a
l
u
e
i
s
“
0
.
”
RW
RW
R
—
0
5
t
o
7
N
o
t
h
i
n
g
i
s
a
s
s
i
g
n
e
d
.
T
h
i
s
b
i
t
s
a
r
e
w
r
i
t
e
d
i
s
a
b
l
e
b
i
t
s
.
W
h
e
n
t
h
e
s
e
b
i
t
s
a
r
e
r
e
a
d
o
u
t
,
t
h
e
v
a
l
u
e
s
a
r
e
“
0
.
”
R
—
Fig. 8.8.3 A-D Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
A-D control register 2 (AD2) [Address 00ED
16
]
B After reset RW
A-D Control Register 2
0
to
5
6, 7
0
0
Name Functions
D-A converter set bits
(ADC20 to ADC25)
b0b1b2 b3 b4 b5
Nothing is assigned. These bits are write disable bits.
When these bits are reed out, the values are “ 0.”
1
000000
00000
0
0000
0
0
111
1
1
11111
1
111111
: 3/128Vcc
: 5/128Vcc
: 123/128Vcc
: 125/128Vcc
: 127/128Vcc
: 1/128Vcc
RW
R—
Comentarios a estos manuales